JP2001323684A - Brace damper, and manufacturing method for same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size and weight of a brace damper, and provide an effective manufacturing method. SOLUTION: At least two first steel plates 1, and at least one second steel plate 2 laminated between them through viscoelastic material are provided, and side plates 21 comprising steel plates are welded with both side edges of the first steel plates 1 at the outermost layer, so an outer shell is composed of the two side plates 21 and the two first steel plates 1 at the outermost layer. The first steel plates 1 and the second steel plates 2 are alternately laminated holding the viscoelsatic material 3, seal members 30, and spacers 32 in them, the whole body of these are temporarily fastened by bolts, the side plate 21 is welded to the first steel plate 1 to form the outer shell, the whole body of this assembly is heated from the outer side to heat and fuse the viscoelastic material, and the bolts are removed after the viscoelastic material is cooled to be rehardened. The side plate 21 is precedingly welded to the first steel plate 1 at the outermost layer. The assembly is heated as it is raised, so a liquid sump is secured at an upper part of a viscoelastic material filled zone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping damper installed in a building and controlling its vibration, and more particularly to a brace damper installed in the form of a brace and a method of manufacturing the same.

[0002]

2. Description of the Related Art In order to reduce the response of a structure to an earthquake or wind, various types of vibration dampers are installed on the structure as a vibration energy absorbing mechanism. As an example of such a damping damper, a brace damper 10 installed as a brace in a building as shown in FIGS. 4 and 5 has been developed. In this method, a first steel plate 1 and a second steel plate 2, both of which are strip-shaped steel plates, are sandwiched between viscoelastic bodies 3 (for example, rubber asphalt-based viscoelastic bodies and high-attenuation rubber can be suitably used). By alternately laminating them in a state in which they can be relatively displaced in the axial direction, and by providing a casing 4 on the outside thereof, the deformation in a direction other than the axial direction is restrained so that they are not easily buckled.

The above-mentioned brace damper 10 is disposed obliquely as a brace between frame frames composed of columns 5 and beams 6 as shown in FIG.
Are fixed to two members where interlayer displacement occurs through the mounting plate 7, respectively, when the frame is deformed during an earthquake and interlayer displacement occurs, the first steel plate 1 and the second steel plate 2 are pivoted. The brace damper 10 attempts to expand and contract due to relative displacement in the direction. At this time, the vibrating energy is absorbed by the viscous resistance force of the viscoelastic body 3 and the response of the building can be greatly reduced. By the effect of 3, a high damping effect can be obtained in a wide amplitude range from a small-scale earthquake to a large-scale earthquake.

The brace damper 10 shown in FIG.
Is a structure in which two second steel plates 2 are laminated between three first steel plates 1 and a viscoelastic body 3 is sandwiched between them in four layers, but the first steel plate 1 and the second steel plate 2 The vibration damping effect can be arbitrarily adjusted by increasing or decreasing the number of layers and the total cross-sectional area of the viscoelastic body 3.

[0005]

In the conventional brace damper 10, as shown in FIG. 5 (c), the outermost first steel sheet 1 is formed of a flanged steel material 8 and is provided on both sides. The steel plate 9 is arranged, and the steel material 8 and the steel plate 9 are bolted to form the casing 4. The other first steel plate 1 and the second steel plate 2 are formed in the casing 4.
, The casing 4 itself has a considerable weight and the overall outer dimensions must be large, making it difficult to reduce the size and weight. However, there is a problem that the handling is inconvenient and the installation space must be sufficiently secured.

In manufacturing such a brace damper 10, for example, the first steel plate 1 and the second steel plate 2 are bonded by a sheet-shaped viscoelastic body 3 or a rubber-based viscoelastic body 3 is sandwiched. Press-molding and press-fitting, or injecting and filling the liquid viscoelastic body 3 to solidify it, all of which are laborious and costly and inefficient, and the first steel plate 1 And the second steel plate 2
It is not always easy to completely sandwich the viscoelastic body 3 without any gap in the gap while securing an appropriate gap between them, so that this kind of brace damper can be efficiently manufactured on an industrial scale. It was urgently needed to establish an appropriate manufacturing method.

[0007] In view of the above circumstances, an object of the present invention is to provide a brace damper that can be reduced in size and weight without impairing the function as a vibration damper, and an effective method of manufacturing the same.

[0008]

According to a first aspect of the present invention, a plurality of strip-shaped steel plates are laminated via a viscoelastic body so as to be relatively displaceable in an axial direction, and are formed in a building in the form of a brace. A brace damper that is installed and functions as a vibration damper during an earthquake, comprising: at least two first steel plates; and at least one second steel plate laminated between the first steel plates via the viscoelastic body. Having, by welding side plates made of steel plates to both side edges of the two outermost first steel plates,
The outer shell of the brace damper is constituted by the two side plates and the two outermost first steel plates.

According to a second aspect of the present invention, there is provided the method for manufacturing a brace damper according to the first aspect of the present invention, wherein the first steel sheet and the second steel sheet are restricted by a fusible elastic material having a heat melting property and a filling region thereof. A laminating step of alternately laminating while sandwiching a sealing material and a spacer, a temporary assembling step of temporarily fastening the entire laminated first steel plate and second steel plate with bolts, and attaching the side plates to both side edges of the first steel plate. A welding step of welding or forming a shell is sequentially or sequentially performed to form an assembly, and then a heating step of externally heating the entire assembly to heat and melt the viscoelastic body, And a temporary disassembling step of removing the bolt after the viscoelastic body is cooled and re-solidified.

According to a third aspect of the present invention, in the method of manufacturing a brace damper according to the second aspect of the present invention, the side plate is welded to the first outermost first steel plate prior to the laminating step. It is.

According to a fourth aspect of the present invention, in the method of manufacturing a brace damper according to the second or third aspect of the present invention, in the heating step, the assembly is heated in an upright state, and the filling of the viscoelastic body is performed. A liquid pool of the viscoelastic body which is in a molten state is secured above the region.

[0012]

1 and 2 show a structure of a brace damper 20 according to an embodiment of the present invention. The basic configuration of the brace damper 20 of the present embodiment is the same as that of the conventional brace damper 10 shown in FIG. 5, and the first steel plate 1 and the second steel plate 2 are relatively displaced in the axial direction via the viscoelastic body 3. The first steel sheet 1 of the outermost layer is used without using the flanged steel material 8 in the conventional brace damper 10 shown in FIG.
The outer shell of the brace damper 20 is formed by directly welding the side plates 21 made of a steel plate between both side edges of the brace damper 20 by the two side plates 21 and the two outermost first steel plates 1 themselves. Like that. In the illustrated example, four first steel plates 1 and three second steel plates 2 are used, and six layers of the viscoelastic body 3 are laminated between them.
And the number of the second steel plate 2 is one or more.

In the brace damper 20 of the present embodiment, the outer shell is formed by welding the side plates 21 so that deformation in directions other than the axial direction is effective even if the conventional casing 4 is omitted. And buckling is unlikely to occur. Therefore, the size and weight can be reduced as compared with the conventional one, the handling becomes easy, and the installation space can be saved.

In the brace damper 20 described above, the base ends of the four first steel plates 1 (FIGS. 1A and 1B)
At the left end of the second steel plate 2 are fastened together by bolts via the sandwiching plate 22 and the joint plate 23, and the base ends (the same right end) of the three second steel plates 2 are sandwiched via the sandwiching plate 24. The second steel plate 2 in the center
Are extended as they are to function as joint plates 25, and stiffening plates 26 are welded to the joint plates 23, 25 on both surfaces to form a cross-shaped cross section. Code 3
0 is a sealing material, 31 is a bolt hole, and 32 is a spacer, which will be described below.

FIGS. 3A to 3F show an embodiment of the manufacturing method of the present invention. The manufacturing method of the present embodiment is intended for the above-described brace damper 20, and is a heat-fusible material that is solid at room temperature as a viscoelastic body 3 but exhibits a molten state by heating, for example, asphalt, synthetic rubber,
Acrylic resin or the like is adopted, and it is basically sandwiched between the first steel plate 1 and the second steel plate 2 in the form of a sheet or a pellet, and in this state, is melted by external heating and solidified again. Specifically, the following procedure is used.

As shown in the first welding step (a), the side plates 21 are welded to both side edges of the first outermost layer of the first steel plate 1 in a state of being placed flat.
Box-shaped section. The bolt holes 31 are formed in advance on all the first steel plates 1 and the second steel plates 2, and the bolts 36 are previously mounted on the bolt holes 31 of the outermost first steel plate.

As shown in the laminating step (b), a viscoelastic body 3, a second steel sheet 2, a viscoelastic body 3, and other first steel sheets 1,... .

At this time, the second steel plate 2 and the first steel plate 1 are laminated using the bolt 36 as a ruler. As shown in FIG. The annular spacer 32 is attached, and the second spacer is
The gap between the steel plates 2 is regulated. The viscoelastic body 3
Spacer 3 to absorb shrinkage (shrinkage) when solidifying
No. 2 does not restrict the gap between the first steel sheet 1 and the second steel sheet 2. Further, the spacer 32 has a function of preventing the viscoelastic body 3 from leaking from the bolt hole 31, but it is necessary to prevent the relative displacement between the first steel plate 1 and the second steel plate 2 after completion.

A seal member 30 for regulating the filling region 34 of the viscoelastic body 3 is interposed between the first steel plate 1 and the second steel plate 2 as shown in FIG. In the present embodiment, since the assembly 38 is heated in an upright state in a later step as shown in (f), the seal member 30 may be interposed only at a position that becomes the bottom when the assembly is raised. It is optimal to use silicone rubber having elasticity and heat resistance in the form of a rope as the sealing material 30.

Further, a liquid pool 35 of the viscoelastic body 3 in a molten state is secured above the filling region 34 of the viscoelastic body 3, and the viscoelastic body 3 is sandwiched between the liquid pool 35. .

Temporary Assembling Step and Second Welding Step After the uppermost first steel sheet 1 is laminated in the above-described laminating step, a nut 37 is screwed onto the bolt 36 as shown in FIG. As shown in (c), the outer shell is completed by welding both side edges of the uppermost first steel plate 1 to both side plates 21.

Heating Step The assembly 38 assembled by the above-described steps is erected as shown in (f), and the whole is heated from the outside by, for example, being charged into a heating furnace to heat and melt the viscoelastic body 3. As a result, the viscoelastic body 3 in a molten state is filled up to every corner between the first steel sheet 1 and the second steel sheet 2, and the air inside naturally rises and is removed, It can be completely filled without bubbles remaining. Of course, the bottom of the filling region 34 is sealed by the sealing material 30, the side is closed by the side plate 21, and the periphery of the bolt hole 31 is the spacer 3.
2, the viscoelastic body 3 does not leak. The volume reduction of the viscoelastic body 3 during re-solidification is absorbed by the liquid pool 35 described above.

Temporary assembly disassembly step After the viscoelastic body 3 has been cooled and solidified again by natural cooling for about 10 hours or forced cooling, the bolt 36 is removed. Thus, the brace damper 20 is completed.

According to the above-described manufacturing method, the brace damper 20 can be manufactured easily and efficiently on an industrial scale, and can be manufactured at a low cost. In particular, by melting and re-solidifying the viscoelastic body 3 by heating from the outside, it can be completely completely filled into every corner of the filling region, and by heating the assembly 38 in an upright state, Since the liquid pool 35 is ensured, it is possible to reliably prevent insufficient filling due to a reduction in volume during re-solidification.

When assembling the assembly 38, the first steel plate 1 and the side plate 21 are first assembled into a box shape as described above, and the viscoelastic body 3 and the second steel plate 2,
By stacking the other first steel plates 1, the filling region 34 of the viscoelastic body 3 is naturally regulated by the side plate 21, and the positioning of the second steel plate 2 and the other first steel plate 1 is naturally performed. In particular, the workability is excellent. However, this is not necessarily the case, and all first steel plates 1 and second
The side plates 21 may be welded to the two outermost first steel plates 1 after the steel plates 2 are appropriately positioned and laminated.

[0026]

According to the first aspect of the present invention, there is provided a brace damper.
At least two first steel plates, and at least one second steel plate laminated between the first steel plates with the viscoelastic body interposed therebetween, with respect to both side edges of the two outermost first steel plates. The outer shell of the brace damper is formed by welding the side plates made of steel plates, and the two side plates and the two outermost first steel plates constitute the outer shell of the brace damper. As a result, buckling is prevented, so that the casing can be omitted without impairing the function as a damper, and this type of brace damper can be reduced in size and weight.

According to a second aspect of the present invention, the first steel plate and the second steel plate are alternately laminated while sandwiching a viscoelastic body, a sealing material, and a spacer, and the whole of them is temporarily fastened with bolts to form an outermost layer. After the side plates are welded to both side edges of the first steel plate to form an outer shell and the assembly is assembled, the entire assembly is heated from the outside to heat and melt the viscoelastic body. Since the bolt is removed after being cooled and re-solidified, this kind of brace damper can be manufactured efficiently and inexpensively on an industrial scale.

In the manufacturing method according to the third aspect of the present invention, the side plate is first welded to the first outermost first steel plate, and then the viscoelastic body and another steel plate are laminated on the inner side. ,
The workability is particularly excellent because the side plate facilitates the positioning of the viscoelastic body filling region and the steel plate.

According to the manufacturing method of the fourth aspect of the present invention, since the assembly is heated in the upright state and a liquid pool is secured above the filling region of the viscoelastic body, the volume of the viscoelastic body is reduced when it is re-solidified. Thus, it is possible to reliably prevent the occurrence of insufficient filling.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a brace damper according to an embodiment of the present invention.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a view showing a manufacturing procedure of the same.

FIG. 4 is a view showing an example of installation of a brace damper.

FIG. 5 is a view showing an example of a conventional brace damper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st steel plate 2 2nd steel plate 3 Viscoelastic body 20 Brace damper 21 Side plate 30 Sealing material 31 Bolt hole 32 Spacer 34 Filling area 35 Liquid pool 36 Bolt 38 Assembly

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) F16F 15/04 F16F 15/04 A (72) Inventor Kazuhiko Isoda 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Stock In-house (72) Inventor Junichi Higuchi 4-4-1-18 Nishitenma, Kita-ku, Osaka-shi, Osaka F-term (reference) 2O001 DG01 FA03 GA51 GA59 HB02 HD11 HE01 HE03 KA03 LA01 2E002 FA02 LA00 LA03 LC02 MA11 MA12 3J048 AA05 AC01 AC05 AD05 BD08 DA03 EA38 3J066 AA01 AA26 BA04 BB04 BC05 BD05 BE06

Claims (4)

[Claims] 1. A structure in which a plurality of strip-shaped steel plates are laminated via a viscoelastic body so as to be relatively displaceable in the axial direction, and are installed in the form of a brace in a building to function as a vibration damper during an earthquake. A brace damper, comprising: at least two first steel plates; and at least one second steel plate laminated between the first steel plates with the viscoelastic body interposed therebetween. A side plate made of a steel plate is welded to each side edge of the steel plate, and the outer shell of the brace damper is constituted by the two side plates and the two outermost first steel plates. Brace damper. 2. The method of manufacturing a brace damper according to claim 1, wherein the first steel plate and the second steel plate are sandwiched between a heat-fusible viscoelastic body, a sealing material for regulating a filling region thereof, and a spacer. A laminating step of alternately laminating, a temporary assembling step of temporarily fastening the entire laminated first steel plate and the second steel plate with bolts, welding the side plates to both side edges of the first steel plate to form an outer shell. A heating step of heating the whole of the assembly from the outside to heat and melt the viscoelastic body after forming the assembly by performing the welding step to be formed sequentially or before and after the assembly, and cooling the viscoelastic body. And performing a temporary assembly disassembly step of removing the bolt after the solidification and re-solidification. 3. The method of manufacturing a brace damper according to claim 2, wherein the side plate is welded to the first outermost first steel plate prior to the laminating step. . 4. The method of manufacturing a brace damper according to claim 2, wherein in the heating step, the assembly is heated in a state where the assembly is erected, and a molten state is provided above a filling region of the viscoelastic body. A method of manufacturing a brace damper, which secures a liquid pool of a viscoelastic body.